Pulsating pump



Jufly 30, 1929.

E. J. ROSE 1,722,595

PULSATING PUMP Filed May 5, 1927 2 Sheets-Sheet l .IIHIL INVENTOR. [aka/J x7059;

HJZZSQS E. .1. ROSE PULSATING PUMP Filed May 5, 1927 2 Sheets-Sheet 2 INVENTOR 5090A] Pose, Mwfi/ M Patented July 30, 1929.

UNITED STATES 1,122,595 PATENT OFFICE.

' EDGAR J. ROSE, OF LOS ANGELES, CALIFORNIA.

PULSATING PUMP.

This invention relates to apparatus for use in creating pulsating differences in pressure, that is pulsating super-atmospheric pressure I or pulsating vacuum or sub-atmospheric pressure, particularly for use in connection with suitable devices for applying such pulsating pressure or vacuum to portions of the human body for therapeutic or massage puroses.

D An important object of the invention is to provide a compact pump unit for this purpose and having control means whereby said pump may be caused to create either superatmospheric pressure or vacuum and whereby the intensity ofsuch pressure or vacuum may also be regulated.

A further object is to provide a rotary pump requiring no check valves and adapted to produce pulsating pressure or vacuum due to the fact the pumping action occurs during only a certain portion of each revolution.

A further object of the invention is to provide a pump for this purpose which is adapt- I ed to operate with a minimum of noise so as to adapt it for use in places where the noise created by the type of pump ordinarily used for this purpose is objectionable.

The apparatus comprises essentially a small electric motor mounted on a suitable support and provided with meansfor starta ing and stopping and for controlling the speed thereof, a pump casing secured to said motor and having a circular pump chamber therein, a rotary member mounted on the shaft of said motor and within said pump chamber and eccentric thereto, said rotary member being'provided with a single vane so as to'cause the same to operate as a single vane rotary pump. The apparatus in its preferred form further comprises a pair ofports communicating with said pump chamor at opposite sides of the point of tangency of said rotary member with said pump chamber, an interior port communicating with the interior of said electric motor, an exterior or delivery port communicating with connecting means to which a hose or similar means may be attached for communicating or deliveringthe pressure or vacuum to the desired point, and movable control means provided with passage means whereby different ones of said ports may be placed in communication with one another so as to cause the pump to create either a super-atmospheric condition or a sub-atmospheric condition insaid exterior or delivery Application filed May 5, 1927. Serial No. 188,952.

port. Said. control means also comprise relief means for variably controlling communication between said exterior or delivery port and the outer air so as to regulate the intensity of the pressure or vacuum.

The accompanying drawings illustrate an apparatus embodying my invention and referring .thereto 1* is a plan view of such apparatus.

Fig. 2 is an end elevation thereof.

Fig. 3 is an end view of the pump with the head removed therefrom.

Fig. 4 is a partly sectional side elevation of the apparatus.

Fig. 5 is an end view with the control member removed.

Fig. 6 is a section on line 6-6 in Fig. 5.

7 is a section on line 77 in Fig. 5.

F g. 8 IS a section on line 8-8 in Fig. 5.

F g. 9 is a section on line 99 in Fig. 5.

Fig. 10 is a view of the control member taken from the inner side thereof.

Fig. 11 is a view of the head of the pump casing taken from the inner side thereof.

Fig. 12 is a transverse section on line 12-12 in Fig. 4, but with the rotary member turned to a different position.

Fig. 13 is a detailed section on line 1313 in Fig. 12.

Fig. 14 is a partial section on line 14-14 1n Fig. 2.

The apparatus shown comprises a sup-,

porting base 1 upon one end of which is mounted a small electric motor 2. An electric connecting cord 3 is provided for supplying electric current to said motor and a switch 4 is included in such supply circuit for starting and stopping the motor. A secondswitch 5 is also preferably supplied for regulating the speed of the motor, for example by cutting a suitable resistance in or out of the field circuit thereof.

A cylindrical pump casing is secured to the motor 2 at one side thereof in any suitable manner for example by means of threaded studs 8 secured to the motor housing and nuts 9 screwing on said threaded studs; The pump casing 7 may be provided with suitable recesses 10 for receiving said nuts. Said pump casing is provided with a cylindrical pump chamber 12 which is eccentric with respect to the shaft 13 of motor 2. Said shaft projects into said pump cham- ,ber and a rotary member 14 is secured to said shaft by means of set screw 15. Said rotary member is cylindrical in shape and when so mounted on shaft 13 is eccentric with respect to pump chamber 12- and is substantially tangent to the wall of said chamber at one point as at 16. The rotary member 14 is provided with a vane 17 slidably mounted in a recess 18 therein and said vane may be adapted as shown to be thrown outward by centrifugal force against the wall of the pump chamber 12. Said vane extends entirely across the chamber 12 and makes a fairly close sliding fit with the side walls thereof.

The pump casing is further provided with an outlet port 21 and an inlet port 22, respectively establishing communication between a pair of chambers or passages 23 and 24 and the pump chamber 12 at opposite sides of the point of tangency of the rotary member 14, and with a passage 26 communicating with the interior of motor 2 for the purpose of causing a current of air to be drawn in or discharged through the interior of said motor for the purpose of cooling the same as hereinafter explained. Outlet port 21 and inlet port 22 are spaced suiticiently from one another around the periphery of the pump chamber to provide for the desired pulsating effect, due to suspension of the pumping action while the vane 17 is passing through the are between said ports as hereinafter described.

A fiat head or plate 28 is mounted on the outer end of easing 7, for example by means of screws 29. Said head is recessed slightly at the central portion of its outer face as shown at 30 so as to receive the control member hereinafter described and is 1'0- vided within said recessed portion with our ports 31, 32, 33 and 34. Said head member is provided at its inner face with two ports or openings 36 and 37 adapted to register respectively with chambers 23 and 24 in the pump casing, and is also provided with an mterior port 38 registering with passage '26 in said casing. Said head member is also provided with a passage 40 connecting ports 31 and 36, a passage 41 connecting ports 32 and 37, a passage 42 connecting ports 34 and 38, and a passage 43 connecting port 33 with a central exterior or delivery port 44.

A control member 46 is rotatably mounted on head member 28, as by means of threaded nipple 47 screwing into said head member. Resilient friction means are preferably provided between said threaded nipple and control member 46, said friction means comprising for example a coiled spring 48 positioned between a flange 49 on said nipple and a friction washer 5() bearing against the inner end of recess 51 in said control member. The nipple 47 is preferably formcd at its outer end to receive a hose or other connecting means as at 52.

Said control member is provided with passage means cooperating with the ports and passages in head member 28, for variably establishing communication between delivery ort 44 and either the inlet or outlet port of the pump and between the other of said inlet or outlet ports and said internal port. For this purpose said control member may be provided at its inner side with an arcshaped groove or passage 55 which may be turned into position, by rotation of said control member, to establish communication between port 34 and either of the ports 31 or 32. In the position in which the control member is shown in Fig. '0 said passage is in position to establish communication between ports 34 and 32. Said control member is also provided with a depression or recess 57 adapted to establish communication between port 33 and either of the ports 31 or 32, and in the position shown ir Fig. 10 said recess establishes comn'nmication between ports 31 and 33. The control member 46 is also provided with one or preferably several relief openings 59 adapted to be moved into or out of position to register with port 33, said openings extending to the periphery of the control memher so as to establish communication with the outer air. It will be noted that the recess 57 extends between openings 59 and the center of the control member and is separated therefrom by the intervening wall60.

Control member 46 may advantageously be provided with an indicating pointer 62 and two projecting lugs 63 are preferably provided on head member 28 for limiting the rotative movement of said control member. Suitable legends are also preferably provided on the outer face of head member 28 as shown in Fig. 5, for indicating that when the control member is turned so as to move pointer 62 to the left of its vertical position the pump operates to deliver pressure and when said control member is turned in the reverse direction it operates to deliver vacuum. The legends also indicate that as the control member is turned in either direction the intensity of the pressure or vacuum increases from low to high.

A hose or other connecting means 65 may be connected to nipple 47, said hose being connected at its other end to a suitable cup or applicator member 66 or to any desired means for utilizing orapplying the pressure or vacuum created by the pump.

In the operation of the above described apparatus, when the electric motor is started by means of switch 4, the rotary member 14 is set in rotation in a clockwise direction as indicated by the arrows in Figs. 3 and 12. \Vhen said member is rotating at either of its normal operating speeds the centrifugal force caused by such rotation is sufiieient to cause vane 17 to be thrown outwardly into contact with the wall of pump chamber 12, so that the device operates in the well-known manner of a single vane rotary pump, drawing air in through port 22 and forcing the same out through port 21, during the greater part of each revolution.

With the control member set in the position shown in Figs. 2 and 10,.that is to say, with the pointer 62 indicating compression, the groove 55 establishes communication between ports 32 and 34 while recess 57 establishes communication between ports 31 and 33. Airis therefore drawn in through the motor casing, thence through passage 26, port 38, passage 42, port 43, recess 55, port/32, passage 41, port 37, chamber 24, and thence through inlet port 22 into pump chamber 12 at the inlet side thereof. Such air is then compressed slightly in said pump chamber and 1s forced out through outlet port 21, chamber 23, port 36, passage 40, port 31, recess 57, port 33, and passage 43, to delivery port 44, and thence through the connecting nipple 47 and hose 65 to the applicator member 66. It will be noted from the relative positions of openings 59 and port 33 at this time that these parts do not register with one another, so that when the indicating pointer 62 is turned to approximately its extreme position at the compression side there is no relief to the atmosphere and the maximum intensity of pressure therefore delivered. As the control member is turned toward its neutral position however, that is, toward the position in which pointer 62 is vertical, the o enin s 59 are adually and successively roug t into reglster with port 33 while at the same time recess 57 gradually moves out of register with said port and recess 55 gradually moves out of register with port 32. Turning of the control member in this direction therefore not only tends to gradually c'ut.

ofif the'passage of the air through these ports but also permits an increasing amount of the pressure to be relieved by leakage of air to the atmosphere through openings 59.

If the pointer 62 is brought to vertical position neither of the recesses 55 and 57 is in communication with either port 31 or 32,

- while openings 59 are in full register with port 33, and the device will therefore 'not deliver. either pressure or vacuum under these conditions. If the control member is turned in the other direction so as to bring the pointer 62 to the vacuum side the.

to the atmosphere.- A variable amount of nal air from zero up to the total ca acity of the pump will also be drawn at this time from the outer air through openings 59 into port 33, the amount of air so drawn in depending as before upon the position of the control member and determining the intensity of the vacuum created.

It will therefore be noted that the pump may be readil adjusted by means of control member 4 so as to deliver either pressure or vacuum and that the intensity of either the pressure or vacuum so delivered may-also be adjusted as desired between the limits of zero and the total capacity of the It ivillalso be noted that the pressure or vacuum delivered by this apparatus is of a pulsating nature,'since during the time that vane 17 is travelling through the are between the point at which it first enters or uncovers outletport' 21 and the point at which it leaves port 22 there will be no pumping action, because during that time the pump chamber is in free communication with both of said ports and they delivery port is therefore in free communication, through the pump-chamber, with the outer air, so as to release the pressure or vacuum, as the case may be. The ulsating pressure or vacuum-thus created is very useful for massage or therapeutic urposes as'itproduces the pulsating or vi rating pressure, or vacuum in cup 66 which is desired for such purposes. V

In addition to the regulation by means of controlmember 46 asabove described, furrying the speed 0 the motor by means of switch 5. I

A particularly advantageous feature of the above described apparatus is that a flow of air through the interior of the motor casing is provided at all times, so as to absorb heat therefrom and, prevent overheating thereof. This flow of air through the motor is maintained by drawing the air in through passage 26 when the device is used to create pressure and b discharging the air through said passage w en the device is used to create a vacuum. While the pump is o crating for the production of vacuum, t e exhausting of the air through the motor casing has the further effect of mufliing the noise created by such exhaust.

I claim:

1. A pumping apparatus comprising an electric motor, a rotary pump mounted at one side of said motor and operatively connected thereto, said pump havinginlet and outlet ports, a delivery port, and an inter- 122 ort communicating with the interior of said motor, a control member havingtwo separate passage means establishing communication, at certain positions of said control member, between said internal port and said inlet port and between said outlet port and said delivery port, and establishing communication at other positions ofsaid control member between said delivery port and said inlet port and between said outlet port and said internal port, said control member being movable into either of said two posifions.

2; An apparatus as set forth in claim 1, said control member also having passage means communicating with the outer air and movable into or out of position to communicate with said delivery port.

3. A pump comprising an electric motor, a rotary pump mounted at one side of said motor and operatively connected thereto, a delivery port, and control means for placing said delivery port in communication with either the outlet or the inlet port of said pump, so as to cause either superatmospheric pressure or vacuum to be created at said delivery port, said pump having an internal port communicating with the interior of said motor, and said control means opcrating to establish communication between said internal port and either said inlet or outlet port when the other of said ports is placed in communication with said delivery ort. p 4. A pump comprising an electric motor, a rotary pump mounted at one side of said motor and operatively connected thereto, a delivery port, and control means for placing said delivery port in communication with either the outlet or the inlet port of .said pump, so as to cause either superatmospheric pressure or vacuum to be created at said delivery port, said control means operating to variably establish communication between said delivery port and said outlet or inlet port so as to regulate the intensity of the pressure or vacuum in said delivery port, and said control means also operating to variably establish communication between said delivery port and the outer air so as to further assist in the regu lation of the pressure or vacuum.

In testimony whereof I have hereunto subscriped my name this 26th day of April 192 EDGAR J. ROSE. 

